Which statement best defines spatial resolution in radiography?

• A. Degree of geometric sharpness
• B. Definition
• C. Accuracy of the structural lines actually recorded in the radiographic image
• D. All of the above

Answer: (D)

Spatial resolution in radiography is about how clearly fine details and edges are reproduced in the image. It reflects the image’s sharpness and the ability to separate closely spaced structures. If edges are crisp and details are well defined, and the structures seen on the radiograph match the true anatomy, resolution is high. The degree of geometric sharpness describes how much blur affects edge clarity; “definition” conveys overall image clarity; and the accuracy of the structural lines actually recorded speaks to fidelity to the real anatomy. Taken together, these aspects cover what spatial resolution encompasses, so all of the above best describes it.